Set 16 of the General Science mixed quiz has 20 multiple-choice questions from 11 different topics of the subject: Work, Energy and Power, Animal Kingdom: Invertebrates and Vertebrates, Gravitation and Pressure and more. 14 of them were asked in real previous-year papers. A topic quiz checks one chapter; this set revises the whole subject at once, the way an exam paper does, where the next question can come from any chapter. Every question carries an explanation of why the correct option is right and why the others are wrong. Keep to the timer, read the explanations at the end, and go back to the notes of any topic where you slipped.
20 questions with answers and explanations
A boy raises a box with a weight of 120 N from a height of 2 m. The work done by him is ________.
Work done against gravity is weight multiplied by height, so 120 × 2 = 240 joules.
Read the full explanation →Animals of which phylum have jointed legs?
The name itself says so: in Greek arthros means jointed and podos means foot, so arthropods are the animals with jointed legs.
Read the full explanation →The upward force experienced by a body immersed in a fluid is equal to the weight of the fluid displaced by it. This statement is known as
It states that a body immersed wholly or partly in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced, so the apparent loss in weight of the body equals the weight of the displaced fluid.
Read the full explanation →The fertilised egg, the zygote, gets implanted in the ________.
The zygote divides as it travels down the fallopian tube and the resulting ball of cells gets implanted in the thick lining of the uterus.
Read the full explanation →The first law of thermodynamics is essentially a statement of
The first law says that the heat supplied to a system is equal to the increase in its internal energy plus the external work it does.
Read the full explanation →Which of the following is combined to form Solder?
Solder is an alloy of lead and tin, usually in nearly equal parts. An alloy is a mixture of a metal with one or more other elements, made to gain a property the pure metal lacks.
Read the full explanation →Which of the following shows the strongest force of attraction between particles?
An iron rod is a solid, and the force of attraction between particles is strongest in the solid state. In a solid the particles sit close together in fixed positions and can only vibrate, so a solid keeps its shape, has a definite volume and can hardly be compressed.
Read the full explanation →The plants of which of the following plant kingdoms are known as algae?
Algae belong to Thallophyta, the simplest division of the plant kingdom. Their body is a thallus, which means it is not divided into root, stem and leaf, and they have no vascular tissue.
Read the full explanation →Which of the following is a trivalent doping element?
Boron has three electrons in its outermost shell, so it is a trivalent element and is used as a p-type dopant.
Read the full explanation →Which of the following activities best demonstrates that there is a force of attraction between particles of matter?
Force has to be applied to break the chalk because its particles hold one another together, and that pull is the force of attraction between particles.
Read the full explanation →While releasing the arrow from a stretched bow, the Potential Energy of the bow is converted into?
A stretched bow stores elastic potential energy, and when the string is released that store becomes the kinetic energy of the flying arrow.
Read the full explanation →How many P-N junction diode(s) is/are required for a full wave rectifier circuit? (Center-Tap)
A centre-tap full wave rectifier needs two p-n junction diodes, one for each half of the input cycle. The secondary winding of the transformer is tapped at its middle, so its two halves give equal voltages of opposite sign.
Read the full explanation →The weight of a body on the surface of the moon is about how much of its weight on the surface of the earth?
Weight equals mass times the acceleration due to gravity, and the acceleration due to gravity on the moon is about one-sixth of its value on the earth because the moon has a much smaller mass and a smaller radius.
Read the full explanation →The statement that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially, is equal to the weight of the fluid that the body displaces is related to:
It states that the upthrust on a body dipped fully or partly in a fluid equals the weight of the fluid the body pushes aside.
Read the full explanation →Which law of thermodynamics provides the basis for the concept of temperature?
It states that if body A is in thermal equilibrium with body C, and body B is also in thermal equilibrium with body C, then A and B are in thermal equilibrium with each other.
Read the full explanation →In the double-helix structure of human DNA, base Adenine forms two hydrogen bonds with which of the following bases to form a base-pair?
In DNA, adenine always pairs with thymine through two hydrogen bonds, and guanine pairs with cytosine through three. This is called complementary base pairing, and it is why one strand of DNA can be used to copy the other.
Read the full explanation →Mechanical energy is equal to:
The mechanical energy of a body is the sum of the energy of its motion and the energy of its position.
Read the full explanation →A barometer is used to measure which of the following?
A mercury barometer balances the pressure of the atmosphere against a column of mercury, which stands about 76 centimetres high at sea level.
Read the full explanation →Heat from the sun reaches the earth mainly by which mode of transfer?
The space between the sun and the earth is very nearly empty, and radiation is the only mode of heat transfer that needs no material medium: energy travels as electromagnetic waves at the speed of light and is absorbed when it strikes matter.
Read the full explanation →A force increases the speed of a 1.0 kg object from 4 m/s to 8 m/s. The work done by the force will be ______.
By the work-energy theorem the work done equals the change in kinetic energy, which is half of 1.0 into 8 squared minus 4 squared, that is 0.5 × (64 - 16) = 24 joule.
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